Reflector



A. L. ARENBERG..

REFLECIOR.

APPLICATION FILED JAN- 10. 1920.

1,407,910. Patented Feb. 28, 1922..

A1. BERT L A/PENBERG,

ATTYE UNITED STATES f ALBERT L. ABENBERG, OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

REFLECTOR.

Patented Feb. 28, 1922.

Application filed January 10, 1920. Serial No. 350,523.

To all whom alt may concern: Y 7

Be it known that I, ALBERT L. ARENBERG,

a citizen. of the United States, residing at. Chicago, in the count-y of Cook and State of Illinois, have invented a certain new and useful Improvement in Reflectors, of which the following is a specification.

My invention relates to reflectors more particularly for commercial and industrial lighting, and the object of the invention is to provide simple and inexpensive means whereby the great bulk of the light rays emanating from the lamp bulb will be thrown downward and outward but a small portion will be thrown outward and upward to illuminate the ceiling to a moderate extent and thus improve the appearance and cheerfulness of the room.

I obtain my object by the construction illustrated in the'accompanying drawings in which- Figure 1 is a central vertical section of a reflector embodying my invention, and

Figure 2 is a top plan view of approximately one-half of the reflector showing the construction at the periphery thereof.

Like numerals denote like parts throughout the several views.

In the particular form selected to illustrate the invention the reflector has four main zones or divisions,viz'., .a main domelike portion 1, a trunco conical stem 2 surmounting the domelike port-ion, an annular slightly upward. The frusto conical portion 2 is well adapted to house a lamp receptacle or socket 6 for supporting and energizing an electric lamp bulb 7. It is also desirable that the portion 2 have an opening 10 at the top to accommodate a stem 11' or other fixture element by which the reflector is supported and the supply conductors (not shown) housed.

A row of apertures 12 is formed near the bottom of the portion 3, these, pertures being arranged symmetrically in a horizontal ring and so placed that the light rays emanating from the filament 14 of the lamp bulb will pass through said apertures, impinging upon the upper surface of the flange 4 and be reflected by said flange upward and outward as indicated in the dotted lines in Figure 1.

It is desirable, although not essential, to form a beading 15 at the outer rim of'the flange 4. This not only imparts a finished appearance to the device as a whole and strengthens it, but renders it more certain that no light rays passing through the apertures 12 will be visible to the eye of an observer standing at any point below the level of the device. As a practical matter, it is desirable that the entire reflector be white enameled both inside and outside, thus promoting its reflective properties both as to the rays which strike the underside of the reflector and also as to those which pass out through the openings 12 and strike the upper surface of the flange 4:.

In use, when the lamp is energized by far the major portion of the rays, except those which pass directly to a point below the lower rim, will strike the underside of the reflector and be diffused in a manner depending upon the precise configuration of the reflector and the particular location of the lamp filament with respect to it. A small portion of the rays, however, will pass out through the openings 12 and impinge upon the upper surface of the flange 4. The rays which thus pass through these apertures will be reflected upward and outward and be diifused in such manner as to produce a soft and pleasant lighting effect upon the ceiling above. The rays thus passing through the apertures will not beof any particular value in illuminatingthe parts directly beneath, but they are none the less valuable in promoting the general lighting effect which prevents the formation of dark shadows above a fixture. Reflectors are usually located not very far below the ceiling and hence are considerably above the level of the eyes of persons standing or sitting in the room. Under these conditions with my device the observer will not obtain direct 'vision of the light rays which pass out through the apertures. Such observer will, however, see the apertures'from the lower side of the reflector and when the apertures are symmetrically formed and placed, as typified in the accompanying drawings. they constitute a decoration in themselves and add an unusual and attrac- 4 within the zones 1, 2, and 3 may be considerably varied without departing from the spirit of the invention, the underlying principle of the invention being pointed out in the appended claims.

Having thus described my invention what I claim as new and desire to secure by Letters Patent, is:

1. A concave reflector adapted to contain asource of light on itsconcave side, the rim at the mouth of the reflector being in a plane at right angles to the axis, and a flange bordering the rim and extending approximately radially outward therefrom, the reflector having apertures behind'the plane of the rim whereby the light passing through them from the internal light source may-strike the back surface of the flange.

2. A concave reflector adapted to contain a source of light behind the plane of its mouth, an annular flange formed at the mouth of the reflector, said flange being oblique to the axis of the reflector and projecting obliquely backward from the mouth of the reflector, the body of the reflector being apertured near to but behind the point where the flange joins the body of the reflector whereby the rays emanating from the source of light will pass through the apertures and strike the back surface of the flange.

3. A concave reflector having a flange extending upward and outward from its lower margin, means for suspending a source of light at the central axis of the reflector and slightly above the lower edge thereof, the reflector having a row of apertures in the concave portion near but slightly above the lower edge whereby the light rays passing from said source out through said aperture gmpinge upon the upper surface of said an e.

4. A concave reflector havin a flaring open mouth, the rim whereof is at right angles to the axis of the device, and is adapted to lie in a horizontal plane, a source of light located chiefly above the plane of the rim substantially at the axis, the reflector having apertures near the lower-rim of the reflector, and an annular flange having reflecting properties and extending outward and upward from the rim whereby the light rays passing through the apertures will strike the top of the flange andbe reflected upward.

In witness whereof, I have hereunto subscribed my name.

ALBERT L. ARENBERG. 

